I looked at many places on the net and I didn't found nothing about that procedure for the 990R. It bothers me a bit, when I ride with the 19/17 combo, the speedo is a good 10 km/h more (depending on the speed). So it make more km on the odometer. While traveling, it bothers me a lot. It's harder to calculate when I need to refuel.

990R dash is the same as the 690, you need to cut a wire to the back of the dash that locks the wheel size. You can then adjust wheel size using the mode and set buttons. I did it on my 690 and worked well.

These are the notes I kept, this is the procedure once you have cut the wire:

*Turn key to "on" and with the meter set to "Trip 1", press and hold "Mode" for 10 sec.
Length xxxx (the 17" circumference) will show up (flashing), press "mode" to increase and "set" to decrease the circumference.
The correct setting for 21" should be 2205.
*Press "mode" and "set" simultanously to set it.

You will need to search the big 690 thread the find which wire to cut, I recall there are pics.

I read this procedure elsewhere and haven't tried it myself, but I figured I'd pass it on in case you're adventurous enough to try it:

*Remove old Odometer and the connector.
*Cut the wire for pin 18 (should be Brown/Grey for 690E) on the connector.
*Install Odometer
*Turn key to "on" and with the meter set to "Trip 1", press and hold "Mode" for 10 sec.
Length xxxx (the 17" circumference) will show up (flashing), press "mode" to increase and "set" to decrease the circumference.
The correct setting for 21" should be 2205.
*Press "mode" and "set" simultanously to set it.

The only thing that the "pin 18" do is lock the Odo from adjusting wheelsize.

Now that I have been able to sneak in some miles this warm February w/ the new tire/wheel set up, here some some quick thoughts:

* The bike feels more sporty. Paved road corning has greatly improved and the big bike feels like it wants to tip in to every corner. I like that.

* The stock kick stand is too long now and I need *think* about bike placement before leaving it on the side stand. I may look for a shorter after market stand for when I'm using the 19/17 set up.

* Also, the center stand is long now which makes for a little more effort required to get the 990 up. But, I do like the add'l wheel clearance while the bike is on the center stand.

* Given the fact the bike appears to be lower to the ground now w/ the shorter wheels (as evidence by the the effects on the side and center stands), the bike does not feel lower to ground with my modest 28" inseam.

* Regarding the bike being lower to the ground, I wonder when I get into some awesome twisties, will I have less ground clearance when it comes to dragging the pegs? A few hours on WV's finest will let me know that soon enough.

Now that I have been able to sneak in some miles this warm February w/ the new tire/wheel set up, here some some quick thoughts:

* The bike feels more sporty. Paved road corning has greatly improved and the big bike feels like it wants to tip in to every corner. I like that.

* The stock kick stand is too long now and I need *think* about bike placement before leaving it on the side stand. I may look for a shorter after market stand for when I'm using the 19/17 set up.

here's one version that adjusts,,to give you one idea,,it has a 2'' range,,,good for any 17/18/19/21 wheel combination..
,,also has bigger pad...takes less than a minute to adjust

also works great when you carry extra riders and luggage,,,,,

heard you can also get a shorter sidestand off the SM,,,

,

* Also, the center stand is long now which makes for a little more effort required to get the 990 up. But, I do like the add'l wheel clearance while the bike is on the center stand.

* Given the fact the bike appears to be lower to the ground now w/ the shorter wheels (as evidence by the the effects on the side and center stands), the bike does not feel lower to ground with my modest 28" inseam.

* Regarding the bike being lower to the ground, I wonder when I get into some awesome twisties, will I have less ground clearance when it comes to dragging the pegs? A few hours on WV's finest will let me know that soon enough.

if you get to touching things,,,you'll be the first one!!!,,,make sure you record it for us all
w....

990R dash is the same as the 690, you need to cut a wire to the back of the dash that locks the wheel size. You can then adjust wheel size using the mode and set buttons. I did it on my 690 and worked well.

These are the notes I kept, this is the procedure once you have cut the wire:

*Turn key to "on" and with the meter set to "Trip 1", press and hold "Mode" for 10 sec.
Length xxxx (the 17" circumference) will show up (flashing), press "mode" to increase and "set" to decrease the circumference.
The correct setting for 21" should be 2205.
*Press "mode" and "set" simultanously to set it.

You will need to search the big 690 thread the find which wire to cut, I recall there are pics.

I don't want to polute this thread, so I folow this discusion on a thread I started few months ago about wheel size setting on the 990R.